Question

Create a Linux program that asks two scores from the user, specifically the raw score as the first score and the total score as the second score. Store the digits in the EAX and EBX register, respectively. Given the formula raw score divided by total score times 50 and plus 50. Store the result in memory location ‘res’ and finally display the result.

Answer 1

SYS_EXIT equ 1
SYS_READ equ 3
SYS_WRITE equ 4
STDIN equ 0
STDOUT equ 1
segment .data
msg1 db "Please enter the 1st Score: ", 0xA,0xD
len1 equ $- msg1
msg2 db "Please enter the 2nd Score: ", 0xA,0xD
len2 equ $- msg2
msg3 db "The result of 1st Score/2nd Score * 50 + 50 : "
len3 equ $- msg3
segment .bss
num1 resb 2
num2 resb 2
res resb 3
qoutient resb 3

product resb 3
section .text
global _start
_start: ;tell linker entry point;
Enter the first Score
mov eax, SYS_WRITE
mov ebx, STDOUT
mov ecx, msg1
mov edx, len1
int 0x80
mov eax, SYS_READ
mov ebx, STDIN
mov ecx, num1
mov edx, 2
int 0x80 ;
Enter the 2nd Scoremov eax, SYS_WRITE
mov ebx, STDOUT
mov ecx, msg2
mov edx, len2
int 0x80
mov eax, SYS_READ
mov ebx, STDIN

mov ecx, msg3 mov edx, len3 int 0x80 ; moving the first number to eax register and second number to ebx ; and subtracting ascii '0' to convert it into a decimal number       mov eax, [num1] sub eax, '0'    mov ebx, [num2] sub ebx, '0' ; add eax and ebx add eax, ebx ; add '0' to to convert the sum from decimal to ASCII add eax, '0' ; storing the sum in memory location res mov [res], eax ; print the sum mov eax, SYS_WRITE mov ebx, STDOUT mov ecx, res mov edx, 1 int 0x80 exit: mov eax, SYS_EXIT xor ebx, ebx int 0x80